This famous saying comes from Sun Tzu's Art of War: "A good fighter seeks the situation and does not complain about others; So you can choose people and follow the trend. If you are in power, you will fight with others, such as turning over wood and stones; Nature of wood and stone: peace is quiet, danger is moving, square is stopping, and circle is fine. Therefore, it is also a potential to be good at fighting against people, such as turning a boulder on a mountain thousands of miles away. ... listen to the benefits, it's a trend, and help others. Those in power will control power because of interests. "

Interpretation of "seeking the situation and not complaining about others" in the context: (a good soldier) always tries to find a favorable situation instead of complaining about others.